Medium Mallet. The patented weight system on the Pro-Custom 1 aluminum handles allows the performer to instantly adjust the feel, balance, and sound characteristics of the mallet. Sliding the weights forward produces the fundamental tone response of a much heavier stick. The 5/8-inch, thin-wall aluminum shaft has the lightness of a bamboo handle, the stiffness of a hardwood handle and the consistency pair-to-pair that only a man-made product can achieve.